A full size pop up gate, or Air Gate from Runcam.
One that can be transported without taking up too much space. Some are hard to get into a car, even after collapsed and if you cant get them where you want without almost renting a van, whats the point?
Your personal gates should be easy and fast to use or you wont use them as much as you otherwise would.
The way forward is more, not less training so pick up a few of these and get to it. No matter if you fly 5inch or smaller these will fit your needs well.
Can be put up on any surface!
Use them for sessions in P-garages during the winter and then wherever you want when the weather gets better.
Make next season your best season!